Abstract #4809
An interleaved opposing monopole transmit-receive array for 7T brain imaging
Gang Chen 1 , Martijn Cloos 1 , and Graham Wiggins 1
1
The Bernard and Irene Schwartz Center for
Biomedical Imaging, Department of Radiology, New York
University School of Medicine, New York, NY, United
States
At high field, electric dipole antennas are seeing
increasing use. When placed close to a relatively high
dielectric material such as the body the self-resonant
length shortens somewhat, but for 7T head imaging this
still comes out to an inconvenient length of 40 cm or
more. We describe here a modified monopole antenna where
the ground plane is replaced by a strip of conductor.
These are arranged in an 8 element array which allows
alternating monopoles to be driven from opposing ends of
the array, which extends excitation into inferior brain
regions while also providing diverse B1 profiles along
Z.
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